Dump bailer



Sept. '30, 1952 Filed Aug. 9, 1946 w. C. GIBSON DUMP BAILER 3 Sheets-Sheet 1 Mya/mf@ ATTE R N EYB W. C. GIPSON Sept. 30, 1952 DUMP BAILER 3 Sheets-Sheet 2 Filed Aug. 9, 1946 INVENTOR. /1/ p so. n

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BY A

WITNESSES:

ATI'D R N EYB Patented Sept. 30, 1952 DUMP BAILER William C. Gipson, Jacksboro, Tex., assignor of one-half to Wesley Senkel, Graham, Tex.

Application August` 9, 1946, Serial No. 689,613

bodiment ofmy invention according to the best mode I have thus far devised but it will be understood that various changes and alterations may be made in the exemplifledstructure within the scope of the appended claims.

In the drawings:

Figure 1 is a front elevational view of an embodiment of my invention shown in position within a. sectional well casing.

Figure 2 is a vertical sectional view at line 2--2 of Figure 1. y

Figure 3 is a front elevational view showing the sliding strap out of engagement with the tripping finger.

' Figure 4 is a vertical sectional view thereof.

Figure 5 is a vertical sectional view of thev upper portion of the apparatus showing the container with its door in openposition.

Figure 6 is a horizontal sectional'view at line 6 6 of Figure 1.

Figure 7 is a detail view of the tripping mechanism; and Y Figure 8 is a side elevational view of my improved dump bailer bottom.

Referring now to the drawings wherein like characters indicate like parts, I have illustrated the present embodiment of myinventon as comprising a cylinder 4 having an .apertured lifting ear 5 xed to the upper edge thereof. The ear 5 is adapted to receive conventional hoisting means whereby the cylinder 4 is adapted to be lowered within a conventional well casing as 2.

The cylinder 4 is of such diameter as will permit ready passage through the casing and is formed with opposed surface notches 6 and 8, which serve as a window to gain access to the door I6 for normally closing the door before using or filling the container or to remove the hinge pin I8 for the door I6 if repair is necessary. The cylinder 4 is also provided with a vertical slot I0 for a purpose to be later described.

Within the cylinder'4 I employ a cylindrical container I2 which is `provided with an upper outwardly flared end portion I4 that is welded orotherwise secured to the cylinder 4 slightly .2 below the upper edge thereof as shown in. Figures 2, 4 and 5 respectively, and this container is provided at the bottom thereof with a door` I6 pivotally secured to the lower edge of the container as at I8 as shown in the above figures.r

k,Adapted for attachment to the exterior of the container I2 and vertically movable in the slot Ill-in the cylinder 4 I utilize the sliding U-shaped strap formed withslots 22 and 24 through which the screws 26 extend to secure the vstrap to the container I2.

The strap is offset outwardly at 28 to form the inner cam surfaces 30 and 3|, and extending transversely of and mounted in the cylinder 4 is a pin 33 on which is pivotally mounted the cam dog 32. The cam dog 32 is positioned within the offset 28 so that the upper end thereof may engage the lower surface of the marginal edge of the door I6 in opposed relation to the pivot I8, maintaining the bottom in closed relation to the lower end of the container I2, the cam surface'30 engagingthe cam dog32 to retain it in the above mentioned position when the U-shaped strap 20 is in its lower position as shown in Figure 2. In the vertical movement of the "strap hereinafter described the cam surface v3| engages 'the lower end of the cam dog 32 to move the dog on the pin 33 to disengage the upper endof the dog from the door I6 to permit the opening of the door I6 of the container I2 as shown in Figure 4.

The lower portion of the strap 20 is bent into U-shape as at 36, the offset 34 permitting the strap to enter the slot of the cylinder 4 and the slotted end 38 of the strap is secured by a screw v 40 which passing through the slotted end 38 is received in the interior surface of the opposite side of the wall of the cylinder 4. I

A V-shaped stirrupv strap 42, constructed yof spring. steel, is provided with opposed straight portions 44 and 45. .The portions 44 and 45 lfrictionally engage the inner surface of the rcasing 2 to retain the strap 42 in sliding reciprocal engagement with the inner surface of the casing 2. The upper ends ofthe portions 44 and fidare inset and enter the cylinder 4 and are provided with the elongated slots 48 and 50 respectively. A pin 52 extending transversely of the cylinder 4 and passing through the slots 43 and 50 detachably secures the strap 42 to the lower end of the cylinder 4. The strap 42 is `use'donly when the contents of `the container I2 are to be dumped above the well bottom, otherwise the U- shaped strap 20 alone is employed to dump the contents of the container I2 at thewell bottom. The dump bailer is lowered ntothe'well to' any desired location with the parts in the position shown in Figs. 1 and 2, cylinder 4 is now raised to cause portion 36 of the strap 20 to engage the nger 54 hingedly mounted at 56 in the yoke 58 on the V-shaped strap 42. The finger 54 is pivoted for movement only above the horizontal so that the strap will pass above the linger 54 as shown in Figure 3. When the cylinder 4 is nowv lowered, the frictional engagement of the portions lfl1 and 45 with the casing 2 will retain the strap 42 in fixed relation relative to the casing 2 so that during the downward movement of strap 20, the finger 54 will be engaged by the lower portion of the U-shaped strap to elevate the strap 20 and actuate the cam dog to disengage the dog from the bottom of the door I6 to permit the door of the container to open and the contents to be dumped.

Under ordinary circumstances it will be found desirable to dump the material at the bottom of y the well in which case the V-shaped strap and its :linger 54 are omitted as the cylinder is lowered within the `well casing, and therefore the bottom portion' of 'the U-shaped strap 20 will engage the bottom of the well directly and through the lsame mechanism of the cam and cam dog, the door will be opened and the material will fall through the cylinder 4 directly to the well bottom. However when'a slow hardening materiallis used and the strap 24J will not engage a surface firm f or its actuation the V- shaped stirrupstrap 42 will -be used, as it does not have to contact'flrm bottom surface to cause the contentsof the container I2 to be dumped.

When the dump Vbailer is once opened men chanically itits impossible for the door to close asrwhen the dump bailer is being elevated to the surface.

Furthermore in being lowered into the well casing there is no danger of the door being opened by contact with the fluid surface as the passage of the ldump' -bailer through suchvfluid aids in pressing upon the door to' maintain it closed until positively tripped by operation of the V-shaped strap if used, or byv the U -shaped strap alon'ei'fth'e V-shapedstrap is not used.

/ Having thusfully described -my invention what I claim as new and Adesire to secure by Letters Patent is:

' 1. A dump bailer bottom vfor use inra well I casing comprising a hollow Ycylinder opening at :its lower 'end to provide an lexit or discharge opening, saidcylinder being formed with intermediate laterally opposed slots ,and a vertical slot, al material container secured within the cylinder Yslightly below the open upper edge thereof, a bottom door pivotally mounted on the lower periphery ofthe container, a strap mounted on the container for vertical movement in the vertical'slot in the cylinder, pivoted means carried by the cylinder adjacent the f-ree edge of the door and adapted'to engage the door to retain the door in closed position, said means 1s engaged by said strap upon upward vertical movement of'the'strap4 relative to thecylmder to pivot' said means to disengage Asaid means from contact with said door to-permit opening of the door, `strapengagingrneans mounted for upward vertical movement on the lower end-olf theA cylinder'for engaging the strap to cause upward vertical'movementof the strap relat1ve to the cylinder, saidistrap engaging means having frictional engagement with the well casing m `which'the bailer is being usedand havingitedlost vertical-motion with'respect to said slightly below the open upper edge thereof, a bottom door pivotally mounted on the lower periphery of the CQDJBfner, a strap mounted on the container for vertical movement in the vertical slot in the cylinder, an offset in the strap forming upper and lower cam faces, cam means carried Aby the cylinder adjacent the free edge of the door and positioned intermediate of said upper and lower cam faces, saidcam means engaging and lretaining the door in closed Yposition when the upper .cam lfaceA engages said cam means, said cam means operable upon -eng-agement with the lower cam'face to release the door, strap engaging means-mounted for vertical movement on the lower endof the cylinder for engaging the strap to cause upward vertical movement of the strap relative to said cylinder to operate said cam-means to release the door, and said strap engaging means having limited lost motion vertical movemer-it'withv respect .,to said strap, and said opposedslots being loca/ted in said cylinder immediately below vthe vpivotal mounting forthe bottom door of the container to permit closing of the-'door before-using vor filling the container.` Y l 3. A dump lbailer bottomlfor vuse in a well casing comprising a hollqw-cylinder vopen at its lower end to providean exit or discharge-opening, said cylinder being formed `with 'intermediate laterally opposed slots and a vertical slot, a material container securedwithin the cylinder slightly below the open upper-edges thereof, a bottom door pivotally mounted on-`the llower periphery of the container,- a strap mountedon'the container for vertical movement in the `vertical slot in the cylinder, anoifset in the,` strap forming cam faces, acam dog pivotally mounted'on the cylinder adjacent thevfreeendof the door adapted to engage said door rand retain it in closed position, said'dog being opera'ble'through engagement therewith of a cam face of` thet strap when the strap is moved upwardly relative `to the cylinder to disengage'from and-permitopening of Ythe door, strap engaging means mounted for vertical movement onjthe 'lower end ofthe cylinde r for engaging f thev strap to cause upward vertical movementfofthestrap'relative 'tothe cylinder, said strap engaging-means having frictional engagement-with thecw'ell vcasing which the bailer is being used and having, limited lost motion vertical Vmovement Awith, respect to said strap, and said opposed slots being located in said cylinder immediately 'below the lpivotal vmounting for the bottom dpor'of' thejcontainer mounted on the lower periphery of the container, of a strap mounted on the container for vertical movement in the slot in the cylinder, pivot means carried by the cylinder for engaging thev door to retain it in closed position, means on the y strap engaging said rst means to disengage said strap engaging said pivot means to disengage said pivot means from said door to permit the opening of the door in response to upward vertical movement of the strap relative to the cylinder, and said strap having a lower U-shaped bend forming a, well bottom engaging portion for causing upward vertical movement of the strap with relation to the cylinder upon contact of the U-shaped bend with the Well bottom, 'and said opposed notches being located in said cylinder` said opposed notches being located in said cylinder immediately below the pivotal mounting for the bottom door in the container to permit closing of said door before using or lling the con? tainer, a strap mounted on the cylinder for vertical movement in the slot in the cylinder, means carried by the cylinder for engaging the door to retain it in closed position, offset means on the rst means from said door to permit the opening of the door in response to upward vertical moveu `ment of the strap relative to the cylinder, the

lower end of the strap being bent upon itself to form a horizontal contact portion, a V-'shaped 4strap slidably mounted in the cylinder and adapted to have constant frictional engagement with the casing, and a hinged iinger pivotally mounted on the V-shaped strap in the path oi v the-rst strap for pivotal movement above the horizontal only so said finger is engageable with l the contact portion of the strap upon downward movement of the strap to cause upward vertical movement of the strap at any desired distance above the bottom of the well, and said V-shaped strap having lost motion vertical movement with respect to said first strap or downward movement of said V-strap relating to said cylinder.

WILLIAM C. GFSGNA REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATESPATENTS Number Name Date 951,408 Sands Mar. 8, 1910 `1,632,271 Breene June 14, 1927 1,687,161 Johnson Oct. 9, 1928 2,144,669 Taylor Jan. 24, 1939 2,401,871

Heeter June 11, 1946 

